1M-gate flash FPGA with 300 I/O in a 484-ball BGA
The Microchip A3P1000-FG484I is a mid-density ProASIC3 flash-based FPGA offering 1 million system gates and 300 user I/O in a 484-ball FBGA package.
I/O count and package — the board-layer decision
With 300 I/O on a 484-ball BGA, the A3P1000-FG484I demands a multi-layer PCB for fan-out — typically four layers minimum, six if you need to route all I/O to the edge without microvias. The 1.425 V core supply is a single rail, which simplifies the power tree compared to older FPGAs that required separate 1.2 V, 1.5 V, and 1.8 V supplies.
On-chip memory — 147456 bits of block RAM
The 147456 bits of embedded RAM are distributed across the fabric as 4,608-bit blocks. This is enough for small FIFOs, coefficient tables, or line buffers in video applications up to about 640×480 resolution. Designs needing larger data buffers — Ethernet frame stores, full-frame video — will require external SRAM or SDRAM connected through the user I/O.